Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 313
wn. Problem 74. Frorti the horizontal ^projection of a line and the angle it formswith the H.P., to find its vertical projection. Fig. 96. Let ah be the horizontal projection, and its angle with theH.P. 45°. At a draw aB at an angle of 45° with XY. With a as centre,and radius ah, draw an arc…
Geometrical drawing
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